In the heart of Rouen, Le Donjon de Rouen (also known as Tour Jeanne d’Arc) is the only remaining visible vestige of the great castle built by Philip Augustus in the 13th century. With its 35 meters in height, walls about 4 meters thick, and a sturdy circular shape, it represents a model of medieval defensive architecture.

The donjon has witnessed crucial historical events: during the Hundred Years' War, it was the scene of the famous trial of Joan of Arc, who was held within its walls and threatened with torture. Largely destroyed in 1590, it was later restored in the 19th century and transformed in the following decades, including its use as a bunker during World War II, the signs of which are still visible.

Today, the Donjon can be visited through self-guided tours recommended for weekends or with guided tours on Sundays, often accompanied by family activity booklets. It also offers historical escape games such as the most recent "Free Rouen!", set in the Resistance bunker, or thematic games related to the Middle Ages.